Some one just starting out is not Google. They do not have Google's problems. They do not need Google's complexity, or a dozen layers of docker/terraform/k8s bullshit.
Even if you don’t need HA it’s still worth it for a small team for ease of deploy.
Docker's interface might seem simple, but it adds an entirely new layer of complexity, with semantics only superficially understood by the vast majority of its users, and nobody ever seems to talk about Docker's negatives. A good rule of thumb might be: if you can't accurately explain how Docker works under the hood, or if you don't understand the OS components Docker itself uses, you shouldn't use it.